Deep-well pump



Nov. 15, I927.

1,649,593 0. W4 JOHNSON I DEE? WELL PUMP Filed OCL 25. 1924 3Sheets-Sheet l v j 4 F 8 @11- 8 IF m 8 1 2 Q I 9a A 31 4.? l 33 k IHIIHIlllfllll lllilllll llll Nov 15 1927 o. w. JOHNSON 9593 DEEP WELL PUMPFiled Oct. 25, 1924 3 Sheets-Sheet 2 10 T v W Y 422 4 7 \x z i F El 22 Z1 3 war/752' Nov. 15, 1 27.

O. W. JO NSON DEEP WEL PUMP Filed Oct. 25, 1924 3 Sheets heet s PatentedNov. 15, 1927.

UNITED STATES PATENT OFFICE.

PORATION, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

Dunn-WELL PUMP.

Application filed October 25, 1924; --Seria1 No. 745,739.

This invention relates to the art of devices employed for deep wellpumping and has reference more particularly to pumps of thedouble-stroke type employing two pistons working in opposition toeachother.

The primary purpose or any invention 15 to provide an "improved workinghead tor pumps 01 this type, with a View to obtaining with a-simple andcompact organization of parts a constantand uniform application of powerfor pun'ipi'ng and a balanced action in the working head, and a lowpower consumption and operating and maintenance cost. Another object toprovide a pump head which may be commerciaily produced at acomparatively low cost and will serve in a practical and eliicientmanner the purpose intended.

Other objects are to provide an improved arrangement of crank gears,piston rods, and crossheads, and an improved housing enclosing andsupporting said parts and embodying certain structural featuresdesirablein a pump-head as will more fully hereinafter appear.

Another purpose is to provide a construction wherein the piston rods andpistons may be quickly and easily removed without dismantling thecross-heads and the operating mechanism thereof. I

Another purpose is to provide an improved oiling system for thoroughlylubr cating all of the working parts, and an improved means formaintaining a complete separation of the lubricating oil from the Waterand of the water from the oil.

Other objects and attendant advantages or" the invention will beapparent to persons skilled in the art as the same becomes betterunderstood from the following detailed de scription, taken in connectionwith the accon'ipanyingdrawings in which I have illustrated a practi *aland approved embodiment of the principle of the invention, and whereinFig. 1 is a front elevation of my improved deep well pump with thecylinder broken out andpartly in section, and the doorot the pump-headhousing removed to disclose interior parts;

Fig. 2 is a diagram otthe upper and lower cross-head :crank gears andtheir driving pinion illustrating the balanced action of the PISCOH rodsthereon;

Fig. 3 is a detail crosssection through the P oil pump, on the line 3-8of Fig. 1;

Fig. A is an enlarged vertical axial section through the working headanditscasing; on the line llof Fig. l; 1

Fig. 5 is an elevation of the working head, with th upper cross-head incross-section and showing the upper and lower cross-heads at theirmaximum separated position;

Fig. 6 is Y an enlarged vertical section through thetop avail of thehousing base above the water discharge chamber, show ing the piston rodpacking and water drain well therein; on the-line 66 of Fig. l;

Fig. 7 is 'a similar vertical section through the lower cross-head,illustrating the ,packing for the inner piston ,rod and water returnducts, etc;

Fig. 8 is a plane section on the line 8-8 of Fig. 1; and r 9 is a topplan detail-of a divided locking ring for the rod packing inthe housmgbase. i i a Referring to the drawings, H designates as an entirety anupright rectangular casing or housing for the working head, the samecomprising a Walls 11, a'detachable'topwall 12, a hinged front door 13,andabasc 14.. The base 14 has *a hollow portion shown in Fig. 1 forminga water discharge chamber 15, and on one side of this hollow portionisaseparated space shown in Fig. 1 that forms an oil well 16. In thebottom of the water discharge chamber 15 is a port 17 (Fig. i) thatregisters withthe upper end of a depending cylinder column 18 extendingdownwardly into the w ll. As shown, the upper end of the cylinder isthreaded into a-collar 1 9 that isattached to the bottom of the housingbase 1% by screws 21.

Rigidly mounted in and between the .top and bottom members of thehousing are a pair of parallel guide rods 22 slidably engaged by upperand lower cross-heads 23 and 2d respectively. As shown in Fig. 5, theupper cross-head 23 is connected by a solid piston rod 25 extendingthrough the rear wall 10 (Fig; l side lower cross-head and the base ofthe housing to a lower piston 26 in the column 18; while the lowercross-head 24:, as best shown in Fig. 7, is connected to a tubularpiston rod 27 that extends through the base of the housing and at itslower end is connected to an upper piston 28.

The cross-heads23 and 24: are slidably mounted on the guide rods 22 andare operated by the following described mechanism blind bearing formedin a side wall or":

the housing, and each of the crank gears 34 likewise has its shaitmounted in a slrmlar bearing 3G in a sidewall. On the inner faces of thegears 83 are wrist pins 37 (Fig.

2) mounted in rollers 38 ig. l) engaged with the opposite grooved sidesof the crosshead 23; and the inner facesot' the lower crank discs 3% areprovided with similar wrist pins 39 mounted in rollers llengaged withtheopposite grooved sides of the lower cross-head 2%. It will heobserved by reference to Fig. 2v that the wrist pins 37 and 39 on theupper and lower pairs of crank gears respectively. are set 180 apart, sothat the cross-heads 23 and 24- always travel simultaneously in oppositedirections.

This movement balances the thrusts oi the load on the housing andbearings of the gears, andinsures asteady and uniform re ciprocatingmovement of the pistons in the operation of pumping with no unbalancedstrains on the pump headr a V The piston rod 2501 the lower piston 26 isconnectedto the upper cross-head 23 in the manner clearly shown in Fig.5. Said cross-head 23 is formed with a central open ing of largerdiameter than the pistons 26 and 28, in which is fitted a bushing 42having a flange 42 at its upper end resting on thetop of the cross-head,and locked in place by a ring nut 43011 its lowerend. The upper end ofthe rod '25 is threaded, and the same is locked in the bushing 42 byupper and lower nuts 44 and 45 respectively. The lower end of thebushing 42, below the nut 43, is threaded to receive the upper end of acircular apron l6 that forms an oil battle.

The connection of the upper end of the tubular piston rod 27 to thelower cross-head 24 is clearly shown in Fig. 7. Said crosshead 24; islikewise formed witha central opening of larger dlameter than thepistons 26 and 28, in which is fitted a bushing 47 having near its upperend a flange 47 resting on the top of the cross-head and confined at itslower end by a ring nut 48. In the bottom of the bushing l7 is a tappedbore 49 into which the upper end of the rod 27 is threaded. On the lowerside of the ring nut 48 is a depending flange 51 internally threaded toreceive the upper-end of another circular apron 52 also constituting anoil baflle.

The rod 25, of course, extends axially through the lower cross-head 24:and its bushing -17. Said bushing is equipped with means to checkleakage 01 oil that may collect on the rod 25 above the lower crosshcaddown through the latter, and also with means to return any water thatmay work upwardly through the cross-head, and prevent its mingling withthe oil. For the latter purpose, the bushing l7 contains a body ofpacking 53 surrounding the rod 25 and compressed by a gland 5a which, inturn, is locked in place by an internally threaded cap 55 screwing ontoa threaded boss 56 on the upper-end of the bushing. The upper end ofthebushing (i7 is formed with an annular groove 57 in which any waterthat may pass the packing 53 and cap 55 and How down over the outersurface of the cap collects, and flows thence downwardly through a duct58 in the bushing into a similar annular groove 59 in the upper face ofa lock nut 61 on the tubular rod 27. Thence the water flows through anoblique duct- 62 in said nut onto the outer surface of the tubular rod27. Any oil collecting on the rod 2:." above the lower cross-head iswipedoil' and prevented from escaping down the rod 25 by an oil wipe 63mounted in the top of a cap 6% which is screwed onto the upper threadedend of the bushing i'. above the flange 47. Both the piston rods, ofcourse, pass through the housing base 14, and this latter is providedwith means for separately collecting both return water and oil, and fordraining oil the return water and leading the oil drippings into the oilwell 16. .The equipment of the base member for these purposes is clearlyshown in Fig. 6, wherein it will be seen that the root portion of thebase above the water discharge chamber 15 is. formed with a centralcircular well (35 through the bottom of which is an opening of reduceddiameter to receive and fit a sleeve 66 supported in said aperture by athreaded flange 66' on its upper end. Within the sleeve 66 is fitted abushing 67, the bushing being supported by a radial flange 68 thereonresting on the bottom of a countersink 69 in the upper endot the sleeve,with an interposed annular washer 71. The internal diameter of thesleeve 66 is also greater than the diameter of the pistons 26 and 28,and the bushing 67 is locked in its till fill

seat by a split locking ring 72 that rests on the radial flange 68 ofthe bushing and is in turn confined bya clamping ring 73 having adepending internally threaded flange 73 screwing onto the upper threadedflange 66 oi. the sleeve 66. The lockingring 72 as shown in Fig. 9, isformed in symmetrical. halves so as toxpermit the bushing 67 to clearsaid ring when it is being removed. )Vithin the bushing 67 andsurrounding the tubular rod 27 is a body of packing material 7 dconfined by a gland 75 in turn compressed by a threaded cap 76 screwingonto the threaded upper end of the bushing 67. Fitted down over andaround the upper wall portion of the well 65 is the base member 77 of anupstanding oil battle 7 8 that also serves to collect and direct intothe well 65 water dripping from the lower cross-head. The return wateris led to the'outside ot the housing through a drain pipe 79 (Fig. 4).

Describing next the provisions for effecting automatic lubrication ofthe pump-head mechanism, P designates as an entirety an I oil pumpin thelower end oi the housing H and located in the oil well 16. The pump hereshown is'ot the rotary type, comprising a vertical cylinder 81 (Fig. 3),an eccentric rotor 82 therein, and a piston blade or vane 83, the endsof which sweep past intake and discharge ports 84 and S5 res aectivelyin the cylinder 81. The intake port 84 communicates with a dependingintake pipe 86 (Fig. 1) that extends nearly to the bottom of thewell 16.The discharge port communicates with a deliverypipe 87 that, as shown inFig. 1, extends upwardly within the housing and at its upper end entersan oil reservoiror chamber 88 (Figs. 4: and 8) herein shown as formedwithin a thickened portion of the cover-plate 12 of the housin The rotor82 of the pump is driven by a vertical shaft 89 (Fig. 1) having on itsupper end a bevel gear 91 meshing with and driven by a bevelgear 92 faston the drive shatt 29. The pump P maintains the body of oil filling theoilchainber 88 under pressure, and the guide rods, crossheads, and gearsare sprayed with oil from the chamber 88. From the chamber 88 an oil jetis directed against one of the guide rods 22 through a duct 93 (Figs. iand 8) and against the other guide rod through a pipe 94. Other pipes 95and 96 lead from the oil chan'iber 88 to or above the bearings 35ot' theupper crank gears 33, whence the oil drips over said gears, the pinions32 and the lower crank gears 34 and their bearings. Considerable oilcollects on the upper surface; ot the cross-heads 23 and 24, and thisoil is assed through oblique ducts 97 and 98 (Fig. l) to thesleevebearings of the CXOS'L- heads on the rods 22. The battles t6 anc 52guard the piston rods against the splashing of the "oil from thecross-head"bearings and it of the housing around the drain well 65 andflows off one side of the latter into the oil well 16, whence it isreturned by the pump to the Oll reservoir 88 atthe top of the housingror recirculation. Such water,

however, as iscarried up by the piston rods is caused to flow back, inthe manner previously described, along or near the outer surface of theouter piston rod 27, finding its way thence into the drain well 65,whence it is discharged through the drain pipe 79.

In the center of the cover-plate 12 of-the housing is a circular opening99 4 ot a diameter slightly larger than the maximum diameter of thecross-head bushings,

said opening being closed by a removable lid 101.

From the foregoing it will be apparent that the pistons and their pistonrods can be bodily removed from the well tube H8 and through thepun'ip-head without disturbing the working positions of the gearing orcross-heads. For such removal of the pistons when required for repairsor renewals, the cover 101 is removed, the ring nut 43 at the bottom ofthe upper cross-head 23 is backed off, the corresponding ring nut 48 atthe bottom of the lower cross-head is backed on, the guard 78on the baseis raised, permitting access to the clamping ring 73 for the unscrewingof the latter, the semicircular scctions oi the locking ring 72 are thenwithdrawn, and the pistons, their rods, together with their cross-headbushings and packings may all then be withdrawn lengthwise through thepump head, and when repaired returned in the same manner and the severallocking rings 43, L8, 72 and 73 replaced. described structure enablesrepairs and renewals to the pistons, piston rods, rod packings, etc, tobe made without requiring dis mantling oi the operating mechanism of thehead, which represents a great saving of time and expense over pumps ofthis character heretofore known and used, wherein, when repairs orrenewals to the pistons are required, an almost complete dismantling ofthe operating mechanism of the pump'head must talre place.

From the foregoing it will be seen that my present invention provides adeep well double-strolze pump characterized by a balanced action or thedriving means, a low motor load, simple, compact and rigid con--atruction, low cost of production, the complete incasing of the workinghart-s of the head protecting the latter from dust, a. posi-' tive teedof oil from an overhead feed or chamber, which eliminates grease cups,

protects the latter t will thus be apparent that the Inn 5 Til sightfeed oilers, etc, automatic circulation of the lubricating oil,requiring replenishment of the oil only at long intervals, and theprovision for removing the pump pistons or plungers through thecross-heads without removing the main housing from its base ordisturbing the cross-heads or their oper ating gears and, finally,provisions for keeping the lubricating oil and the water pumped entirelyseparated.

While I have herein shown and described a practical and usefulembodiment of the principle of my invention it is manifest that thespecific structural details are capable of wide variation andmodification within the principle of the invention and withoutsacrificing any of the benefits and advantages secured thereby. Hence,I, do not limit the invention to the particular structure and organization shown and described for purposes of illustration, but reserveall such variations and modifications as fall within the spirit andpurview of the appended claims.

i I claim 1. In a deep well pump of the type described, the combinationof a pump-head frame, upper and lower cranlrgears journaled in saidframe,a driving pinion meshing with bothsaid crank-gears, andtelescoping piston-rods operatively connected to said crank-gears forsimultaneous reciprocation in opposite directions.

2. In a deep well pump of the type described, the combination of apump-head frame, upper and lower pairs of crank-gears journaled in saidframe, a drive shaft journaled in and transversely of said frame,pinions onsaid shaft meshing with upper and lower gears respectively. ofsaid pairs for driving each pair together, and a pair of piston-rodsoperatively connectedat opposite sides thereof to said upper and lowerpairs of c 'anli-gears respectively for simultaneous reciprocation inopposite directions.

3. In a deep well pump of the type described, the combination of apump-head frame, upper and lower pairs of opposed crank-gears journaledin said frame, a drive shaft journaled in and transversely of saidframe, pinions on said drive shaft meshing with upper and lower gearsrespectively of said opposed pairs, vertical guides in said frame,uppeand lower cross-heads slidably mounted on said guides, wrist pins onehundred and eighty degrees aparton said pairs of eranlegearsrespectively engaged with said cross-heads, and piston-rods respectivelyconnectedto said cross-heads.

4. In adcep well pump of the type described, the combination of apump-head frame, upper and lower pairs of crank-gears journaled in saidframe, a drive shaft journaled in and transversely of said frame,pinions on said drive shaft meshing with upper and lower gearsrespectively ofsaid pairs. vertical gu des in said frame, upper andlower cross-heads slidably mounted on said of a head frame, cross-headguides therein, a cross-head mounted on sald guides, a bush;

ing rcinovably mountedin said cross-head, a piston-rod connected to saldbushing, and a piston on said rod, said bushing being of greaterdiameter than said p ston whereby said bushing, rod and piston maybebodily passed through said cross-head.

6. In a deep well pump, the combination of a head frame, cross-headguides therein, upper and lower cross-heads mounted on said guides,bushings removably mounted in said crossheads, a piston rod connected tosaid upper bushing and extending through the lower bushing, a tubularpiston rod connected to said lower bushing and encircling saidfirst-named piston rod, and pistons on said rods; bother said bushingsbeing of greater diameter than said pistons whereby said bushings, rodsand pistons may be bodily passed through both of said cross-heads.

7. In a deep well pump, the combination of a head frame including abase, cross-head guides in said frame, upper and lower crossheadsmounted ,on said guides, bushings removably mounted in said cross-headsand base, a piston rod connected to said upper bushing and extendingthrough the lower cross-head and base bushings, a tubularpisi ton rodconnected to said lower cross-head bushing and passing through said basebusln mg and encircl ng said first-named rod, and

pistons 011 said. rods; all of said bushings being of greater diameterthan said pistons whereby said bushings, rods and pistons may be bodilypassed through said base and cross-heads.

8. Ina deep well pump, the combination of a head frame, cross-headguides therein, a centrally apertured cross-head mounted on said guide,a bushing fitted to said aperture and formed with an upper radial flangeoverlying the upper side of saidcross-head and a threaded lower endextending below said cross-head, a ring nut on said threaded lower endlocking said bushing in said cross-head, a piston rod connected to saidbushing, and a piston on said rod; said bushing being of greaterdiameter than said piston whereb on the removal of said locking ring,said bushing, rod and piston may be bodily re moved endwise through saidcrosshead.

9. In a deep well pump, the combination emma of a pump-head housing,pump gearing, includlng a. pair of guides and a cross-head slidablyengaged with said guides, in said housing, said cross-head formed withoil ducts between. the top and the guide bearings thereof, an oilchamber at the top of said housing, and means for distributing oil fromsaid chamber over saidpump gearing.

10. In a deep well pump, the combination of a pump-head housing having awater discharge chamber in the base thereof, pump gearing in saidhousing including a crosshead anda piston rod extending therefromthrough said water discharge chamber, means in said housing forcirculating lubricating oil over said pump gearing, and means forpreventing admixture of said lubricating oil with water adhering to saidpiston rod.

11. In a deep well pump, the combination of a pumphead housing having awater discharge chamber, an oil well, and a water drip collecting wellin the base thereof, pump gearing in said housing including acr0ss-head, and a piston rod extending therefrom through said drip welland said water discharge chamber, means in said housing for circulatinglubricating oil over said pump gearing, means for directing oil drip-from said gearing into said oil Well, means for directing water dripfrom said piston rod and cross-head into said drip well, and a waterdrain from said last-named well to the exterior of said housing.

12. In a deep well pump, the combination of a pump-head housing having awater discharge chamber, an oil well, and a water drip collecting wellin the base thereof, pump gearing in said housing including upper andlower cross-heads, and piston rods extending therefrom through said dripwell and said water discharge chamber, ,an oil chamber at the top ofsaid housing, means for distributing oil from said chamber over saidpump gearing, means for directing oil drip from said gearing into saidoil well, an oil pump for forcing oil from said oil well to said oilchamber, means for directing water drip from said piston rods and lowercross head into said drip well, and a water drain from said last-namedwell to the exterior of said housing;

13. In a deep well pump, the combination of a pump-head housing, pumpgearing, including crosshead guides and a cross-head slidabl'y mountedon said guides, in said housing, a piston rod connected to and dependingfrom said cross-head, means for supplying lubricating oil to said pumpgearing, and an oil bafile encircling said piston rod below saidcross-head.

14. In a deep well pump, the combination of a pump-head housing, pumpgearing, in-

eluding cross'head guides and a cross-head slidably mounted on saidguldes, in said housing, a piston rod connected to and depending fromsaid cross-head, means for supplying lubricating oil to said pumpgearing, and an annular apron constituting an oil bail-1e attached tothe lower side of said cross-head and surrounding said piston rod.

15. In a deep well pump,the combination of a pump-head housing, pumpgearing, in-' cluding cross-head guides and upper and lower cross headsslidably mounted onv said guides, in said housing, coaxially disposedsolid and tubular piston rods connected to and depending from said upperand lower cross-heads, respectively, means for supplying lubricating oilto said pump gearing, and annular aprons constitutingoil bafliesattached to the. lower sides of said crossheads respectively around saidpiston rods.

16. In a deep well pump, the combination of a pump-head housingincluding a hollow base formed with a water discharge chamber, pumpgearing, including cross-head guides and upper and lower cross-headsslidably mounted on said guides, in said rods and adapted for telescopicengagement with the oil baffle on said lower cross-head on thedescending travel of the latter.

17 In a deep well pump, the combination of a pump-head housing includinga. hollow base formed with a water discharge chamber, pump gearing insaid housing, a piston rod extending from said pump gearing through saidwater discharge chamber, a cylindrical discharge column connected at itsupper end to the base of said housing and communicating through a portin the latter with said water discharge chamber, and a piston on thelower end of said piston rod in said discharge column.

18. In a deep well pump, thev combination of a pump head housing. pumpgearing in said housing including cross-head guides and upper and lowercross-heads slidablvniounted on said guides. a pair of telescoplngpiston rods connected to said cross-heads, the outer piston rod bei'ngconnected with the lower cross-head and the inner one with the uppercross-head, a stuffing box in the lower cross-head crates. an auxiliarystuliing box on said lower cross-head having said inner rod operatingtherethrough, said stuiiing boxes having a closed chamber therebetween.and means for conducting seepage of water from said chamber to the lowerside of said cross-head.

through which the inner rod op-.

1.9.II1a deep well pump, the combination of a pump head housing, pumpgearing in said housing including cross-head guides and upper and lowercross-heads slidably mount ed on said guides, a pair of telescopingpiston rods connected tosaid cross-heads, the outer piston rod beingconnected witl'rthe lower corss-head and the inner one with the uppercross-head, a s-tuffing box in the lower cross-headthrough which theinner rod operates, an auxiliarystuiiinn' box on said lower cross-headhaving said inner iod operating: therethroun'h said stuffing boxeshaving awclosed chamber therebetween, means for conducting seepage ofwater from said chamber to the lower side of said crosshead, a drip wellbelow said lower crosshead in said housing for collectin drippine's fromthe cross-head, and means for conducting the water collecting in saidwell to the exterior of said-housing.

20. In a deep 'well pump. th combination of a pump head housing, pumpearing in said hou ing including cross-head guides and upper and lowercross-heads slidablv mounted on said guides. a pair of telescopingpiston rods connected to said cross heads, the outer piston rod beingconnected with th lower cross-head and the inner one with the uppercross-head, a stuffing box in the lower cross-head through which theinner rod operates. an auxiliary stufiing box on said lowor cross-headhaving said inner rod operating therethrough, said stuiling boxes havinga closed chamber therebctween, means for conducting seepageof water fromsaid chamher to the lower side of said crossdiead. a water dischargechamber in thebase of said pump head housing.a stufling box .in theupper wall thereof having said piston rods operating therethrough. adrip well in the upper wall of said vdischarge chamber for collectingdrippinqstrom the under side of said lower cross-head, and means forhonducting the water collecting in said well to the exteriorof saidhousing.

21. In a deep well pump. the combination of a pump head housing, pumprearing in said housing including cross-head guides and upper and lowercrossheads slidablv mounted on said guides. a pair of telescoping pistonrods connected to said cros -heads, the outer piston rod being connectedwith thelower oross-head and the inner one with the upper cross-head, astuflino; box'in the lower crosshead through which the inner rod"operates, an auxiliary stuflingr box on said lower crosshead havingsaid inner rod operating; therethrouL'h, said stuflin r boxes having aclosed chamber therebetween. means for conducting seepage of water fromsaid chamber to the lower side ofsaid cross-head, adrip well below saidlower cross-head in said housing:

for collecting drippings from the cross-head, means for conducting thewater collecting in said well to the exterior of said housing,

and an annular baffle wall rising from said well about said rods and inspaced relation thereto.

22. In a deep well pump, the combination of a pump head housing, pumpgearing in said housing including cross-head guides and upper and lowercross-heads slidably mounted on said guides, a pair ottelescoping piatonrods connected to said cross-heads, the outer piston rodbeing connectedwith the lower cross-head and the inner one with the upper cross-head, astuffing: box in the lower cross-head through which the inner rodoperates, an auxiliary stalling box on said lower cross-head having saidinner rod operating therethrough. said stuffing boxes having a closedchamber therebetween, means :for conducting seepage of water from saidchamber to the lower side of said cross-heath a di'ip'well below saidlower cross-head in said housing for collcctingdrippings from thecross-head, meansfor conducting the water collecting in said well to theexterior of said housing, an annular battle wall rising; from said wellabout said roch and in spaced relation thereto. and another annularbattle wall depcndingrfrom the lower crossliead arranged to telescopewith said last mentioned baffle.

23. In a deep well pump. the coinhinatimi of a pump head housing. pumpgzcarin g in said housing including crus daezid ouidos and upper andlower cross-heads slidablv mounted on said guides, a pair of telescopingpis-* tonrods connected to said cross-heads, the outer piston rod beingconnected with the lower cross-head and the inner one with the uppercross-head, a stilt-ling: box in the lower cross-head through which theinner rod operates, an auxiliary stufiing box on said low or cross-headhaving said inner rod operat ing therethrough, said stalling: boxeslmrinf: a closed. chamber therehetween, means for conducting seepage ofwater from said cham; her to the lower side of said cross-head. and adependinr: battle wall on said cross-howl extending about said rods inspaced relation thereto whereby the drainage of seepage of water occurswithinthe enclosure formedtherebv.

24. In a deep well pump. the combination of a pump head housing, pumpgearing in said housing including cross-head iruides and upper and lowercross'heads slidabl mounted on said guides. a pair of telescop' ingpiston rods connected to said crossheads. the outer piston rod beingconnected with the lower cross-head and the inner one with the uppercross-head, a water scaling pack ng in said lower cross-head throughwhich said inner rod is arranged to reciprocate, an oil sealing packingabove said last mentioned packing about saidrod and in spaced relationto the first packing to afford a closed chamber therebetween, adepending baflle wall on said upper cross-head extending about saidinner rod to prevent the splashing of oil onto said rod, meanscommunicating with said chamber for draining water seepage therefrom tothe under side of said lower crosshead, and means for di- 'recting thewater dripping from the lower side of said cross-head to the exterior ofsaid housing,

25. In a deep well pump, the combination of a pump head housing, pumpgearing in said housing including cross-head guides and upper and lowercross-heads slidably mounted on said guides, a pair of telescopingpiston rods connected to said cross-heads, the outer piston rod beingconnected with the lower cross-head and the inner one with the uppercross-head, a water sealing packing in said lower cross-head throughwhich said inner rod is arranged to reciprocate, an oil sealing packingabove said last mentioned packing about said rod and in spaced relationto the first packing to afford a closed chamber there-between, adepending baflie wall on said upper crosshead extending about said innerrod to prevent the splaslr ing of oil onto said rod, means communicatingwith said chamber for draining water seepage therefrom to the under sideof said lower cross-head, means for directing the water dripping fromthe lower side of said cross-head to the exterior of said housing, andbaffle means beneath said lower crosshead for preventing the splashingof oil onto said outer rod and forming an enclosure for the waterdripping from said lower crosshead.

26. In a deep well pump, the combination of a pump head housing, pumpgearing in said housing including a pair of guides and upper and lowercross-heads slidably mount-- ed on said guides, a bushing removablymounted in each of said guides, a pair of telescoping piston rodsconnected to the bushings in said cross-heads and bearing pistons attheir lower ends, said bushings being of greater diameter than saidpistons whereby said bushings, rods, and pistons may be bodily passedthrough both of said cross-heads, a water sealing packing in the bushingof said lower cross-head about the inner piston rod, an oil sealingpacking supported on said bushing above the first packin in spacedrelation thereto whereby to a old a closed chamber between said pack=ings, a passage provided through said bushing communicating with saidchamber to drain any seepage of water therefrom to the under side ofsaid cross-head, and means for conducting the drippings from the underside of said cross-head to the exterior of said housing.

27. In a deep well pump, the combination of a base, a head framethereon, cross-head guides therein, a cross-head mounted' onsaid guides,a bushing removably mounted in said cross-head, a piston rod connectedto said bushing, apiston on said rod, and a second bushing removablymounted in said base having said rod operating there/through, both ofsaid bushings being of greater diameter than said piston whereby thelatter may be passed bodily through the base and the crosshead, and thesecond named bushing being of a size to pass through the opening forsaid first named bushing in said cross-head.

28. In a deep well pump, the combination of a head frame, cross-headguides therein, upper and lower cross-heads mounted on said guides,bushings removably mounted in said cross-heads, a piston rod connectedto said upper bushing and extending through the lower bushing, a tubularpiston rod connected to the lower bushing and telescoping with the firstrod, and pistons on each of said rods, both of'said bushings being ofgreater diameter than said pistons so that the latter may be passedbodily through the bushing openings in said cross-heads and the lowerbushing being of a size to pass through the opening for the .upperbushing in the upper cross-head.

29. In a deep wellpump, the combination of a base, a head frame thereon,cross-head guides in said frame, upper and lower crossheads mounted onsaid guides, bushings re movably mounted in said cross-heads and base, apiston rod connected to said upper bushing and extending through saidlower cross-head and base bushings, a tubular piston rod connected tothe lower cross-head bushing and telescoping with said first named rodand passing through said base bushing, and pistons on each of said rods,all of said bushings being of greater diameter than said pistons wherebythe latter may be passed bodily through the bushing openings in the baseand cross-heads, and said bushing in the lower cross-head being of asize to pass through the bushing openings in the upper crossdiead whilethe bushing in said base is of a size to pass through the bushingopenings in both of said crossheads.

OSCAR W. JOHNSON.

